enh(api): allow to order hosts and services by last state change

[kduret]

Description

allow to order hosts and services by last state change

Fixes MON-4878

Type of change

• Patch fixing an issue (non-breaking change)
• New functionality (non-breaking change)
• Breaking change (patch or feature) that might cause side effects breaking part of the Software
• Updating documentation (missing information, typo...)

Target serie

• 2.8.x
• 18.10.x
• 19.04.x
• 19.10.x
• 20.04.x (master)

How this pull request can be tested ?

check following urls :

• http://url/centreon/api/version/monitoring/services?limit=50&page=1&sort_by={"service.last_state_change":"DESC"}
• http://url/centreon/api/version/monitoring/hosts?limit=50&page=1&sort_by={"host.last_state_change":"DESC"}